#!/usr/bin/env node
/**
 * Dev runner: starts the CLI content server (port 3000) and the rsbuild web
 * dev server (port 5173) together, then tears both down when either exits.
 *
 *   npm run dev       # both (this script)
 *   npm run dev:cli   # CLI content server only
 *   npm run dev:web   # web dev server only
 */
import { spawn } from "node:child_process";

const isWindows = process.platform === "win32";
const children = new Set();
let shuttingDown = false;

/** Terminate a child and everything it spawned. */
function killTree(child) {
  if (child.exitCode !== null || child.signalCode !== null) return;
  if (isWindows) {
    spawn("taskkill", ["/pid", String(child.pid), "/T", "/F"], {
      stdio: "ignore",
    });
  } else {
    try {
      // Negative pid targets the process group created via `detached`.
      process.kill(-child.pid, "SIGTERM");
    } catch {
      child.kill("SIGTERM");
    }
  }
}

function shutdown(code) {
  if (shuttingDown) return;
  shuttingDown = true;
  for (const child of children) killTree(child);
  process.exitCode = code ?? 0;
}

for (const script of ["dev:cli", "dev:web"]) {
  const child = spawn("npm", ["run", script], {
    stdio: "inherit",
    shell: true,
    detached: !isWindows,
  });
  children.add(child);
  child.on("exit", (code) => shutdown(code ?? 0));
  child.on("error", (error) => {
    console.error(`[dev] Failed to start ${script}: ${error.message}`);
    shutdown(1);
  });
}

process.on("SIGINT", () => shutdown(0));
process.on("SIGTERM", () => shutdown(0));